Safety-valves in water-backs for ranges



UNITED STATES PATENT OEEToE,

T. S. SPEAKMAN, OF PHILADELPHIA, PENNSYLVANIA.

SAFETY-VALVES IN WATER-BACKS FOR RANGES.

Specification forming part of Letters Patent No. 58,1196, dated October2, 1866.

To all whom it may concern:

Be it known that I, T. S. SPEAKMAN, of Camden, New Jersey, have inventedan Improvement in Water-Backs for Ranges, ,850., and I do hereby declarethe following to be a full, clear, and exact description of the same,reference beinghad to the accom pan ying drawings, and to the Letters ofreference marked thereon.

My invention consists of a water-back to which a valve is applied,substantially as described hereinafter, so that should the supplypipebecome obstructed the valve will rise and allow the water or steam toescape from the water-back before the pressure within thelatter or inthe hot-water reservoir becomes so great as t'o rupture the same.

1n order to enable others skilled in the art to make and use myinvention, I will now proceed to describe its construction andoperation.

On reference to the accompanying drawings,

' which form a part of this specification, Figure l is a frontelevation, partly in section, of the water-back of'a range with myimprovement, and Fig. 2 an end View, looking in the direction of thearrow, Fig. 1.

A is an oblong cast-iron box or case, ivhicl is similar to any of theusual water-backs ot' cookingranges, and with this case communicate twopipes, a and a', the former admitting cold water to the case, and thelatter communicating with the reservoir into which t-he heated waterflows.

At one end of the case is a chamber, X, with which communicates a pipe,b, and to an opening whichforms a communication between as to ruptureeither the reservoir or the wa.

ter-back, the explosions resulting from this cause sometimes beingattended with loss of `lite and much damage to property.

In the improved water-back above described the valve B yields when thepressure within the case becomes excessive, and permits the water orsteam to escape into the chamber X, from which it is conducted by thepipe b into any suitable receptacle.

The degree of pressure at which the valve B shall yield can be regulatedby meansof the screw-cap G, by turning which the spring c can 'becompressed to any desired extent.

I claim as my invention and desire to sccure by Letters Patent- Thecombination, substantially as described, of the valve B with awaterback, A, forthc purpose specified.

In testimony whereof I have signed myname to this specifica-tion in thepresence of two subscribing witnesses.

THOMAS S. SPEAKMAN.

Witnesses z CHARLES E. FOSTER, JOHN WHITE.

